Grain-door.



PATENTED APR. 30, 1907. G. W. KELLOGG.

GRAIN DOOR.

APPLICATION FILED JUNE 22. 1906.

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Witnesses w-se run name: PE1ERS cov, WASHINGTON, n. c.

PATENT-ED APR. so, 1901. e. W. KB LLOGG. GRAIN DOOR.

2 SHEETS-SHEET 2. m m m APPLIUATION FILED 111111122, 1906.

UNITED STAQS FLATENT GFFTCE.

GRAIN-DOOR.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed June 22, 1906. Serial No. 322,895.

To all, whomvlt may concern.-

Be it known that I, Gnoncn W. KnLLoeo, a citizen of the United States, and a resident of Grand Forks, in the county of Grand Forks and State of North Dakota, have invented a new and useful Grain Door, of which the following is a specification.

My invention relates to grain doors.

The object of my invention is to provide a door, principally for use in freight cars, which when closed will effectually retain the loose contents, such as grain, within the car, which may be easily opened, and which when opened is compactly and conveniently stored within the car.

The advantages of my invention are more fully set forth hereinafter in connection with a detailed description of an exemplifying structure in which it is embodied, reference being made to the accompanying drawing, in which:

Figure 1 is a view of the closed door, onehalf viewed from the inside and the other half from the outside of a car in which itis placed; Fig. 2 is an end view of the door, in section in the plane of a;a:, Fig. 1; Fig. 3 is a detail view of the end of a cross-bar and an antifriction roller; and Fig. 4 is a detailed crosssection of one of the side frames and guides with the end of a cross-bar, anti-friction roller and sheet metal door plate in position.

Reference numeral 1 designates side posts of a dooropening in a structure such as a box freight ear; 2, door guides, one secured to each side post; these guides are up to a certain height of channel section, of which the web 3 is secured to the side post, and the outer flange 4 forms a continuous guide for the door extending almost to the top of the door opening, and inner flange 5 forms another guide which is discontinued at the top of the door; the web 3 is somewhat wedgeshaped so that from the top of the flange 5 to the bottom of the guide flanges ll: and 5 converge considerably; 6, the door considered as.

a whole, which is built up preferably of sheet metal (5 and cross-bars 6 of channel section; 7, the lower door section; 8, the upper door section; 9, hinges connecting the two sections 10, eyelets, preferably secured to the top of the lower section 7 11, hooks secured to the top of the door frame, one for each eyelet 9, 12, extensions formed on the ends of the cross-bars 6 having lugs 13 in which rollers 14 are journaled; as seen in Fig. 2 the length of these lugs is varied on the different cross-bars so as to bring the rollers firmly in contact with the inner face of the flange 4 when the door is in closed position; 15, a handle for raising and lowering the .door.

As shown in Fig. 1 the door is closed. To open it the handle 15 may be grasped and the door raised in the guides 2 until the top section 8 is entirely clear from the top of the inner flanges 5. The upper section is then folded down against the lower section and the door raised higher until the eyelets 10 may be put over their hooks 11. The door being suspended by its eyelets near the top of the car is swung inward and upward until it lies against the roof completely out of the way and may there be secured in any desirable manner. By a reverse series of operations the doormay be closed.

To close the door it is swung down from the roof of the car and the eyelets l0 lifted off of hooks 11. With the rollers running against the outer flanges 4 of the guides the door is lowered into the guides and the top door section brought up into line with the lower section. As the door is further lowered between the flanges at and 5 the rollers encounter the inside surface of flange 4 and when the door finally comes to its closed position the rollers are wedged firmly against this flange, forcing the sheet metal door surface proper firmly against the inside surface of the inner flange 5, and effectually preventing leakage of the contents of the car.

An important feature of my invention lies not only in the general means employed to secure the desired results, but in the particular nature and formation of these instrumentalities. The door and guides may be readily fitted to existing cars. The metal guides are of simple unit construction and not easily damaged. The door is constructed at moderate expense from material readily accessible in the market. Being of metal it is not subject to warping is the case with a wooden door. It is capable of withstanding rough treatment, and a slight distortion of its members will not destroy its efficiency. The tapered guides and rollers act when the door is closed to force it to its correct position, and this result is attained even if the parts are somewhat distorted or sprung.

So far as I am aware, no one has heretofore proposed the use of a sheet metal door constructed in two sections, reinforced by cross-bars of chamiel section, running in Y guides, one at each side of the door, of which the lower part is of channel section, having a web and two flanges, the flanges converging toward the bottom, so that when the door is closed the rollers firmly engage the outer flange and force the sheet metal surface of the door against the inner surface of the inner flange, preventing escape of the contents of the car, the outer flange being extended above the top of the inner flange toward the top of the door opening, eyelets on the top of the lower door section, and hooks at the top of the door to engage the eyelets.

In testimony whereof I have afliXed my signature in the presence of two witnesses.

GEORGE W. KELLOGG.

Witnesses:

L. F. ALLEN, LAURA DAUBENBERG. 

